15540501013 has 4 divisors (see below), whose sum is σ = 15540845760. Its totient is φ = 15540156268.

The previous prime is 15540501007. The next prime is 15540501061. The reversal of 15540501013 is 31010504551.

It is a happy number.

15540501013 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 31010504551 = 13 ⋅2385423427.

It is a cyclic number.

It is not a de Polignac number, because 15540501013 - 2²¹ = 15538403861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15540504013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 92383 + ... + 199036.

It is an arithmetic number, because the mean of its divisors is an integer number (3885211440).

Almost surely, 2^15540501013 is an apocalyptic number.

It is an amenable number.

15540501013 is a deficient number, since it is larger than the sum of its proper divisors (344747).

15540501013 is an equidigital number, since it uses as much as digits as its factorization.

15540501013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344746.

The product of its (nonzero) digits is 1500, while the sum is 25.

The spelling of 15540501013 in words is "fifteen billion, five hundred forty million, five hundred one thousand, thirteen".